Verner Radials
 

I don't know how these will look on an RV, Probably rather cool on a -4 or -8 ?? They seem to be the right HP range.

http://www.flydiver.com/html/VernerScarlett.htm

How much work is it to install a new and unapproved engine? Is it like multiplying with 2 or 10 compared with a Lycoming?

Maybe 100 times.....
 

The Lycoming or clone bolts on in about an hour after bolting on the mount-maybe 30 minutes for that. All the pieces go on in a few days. Then there is the cowl.....some work here but it is trimming, fitting and details. Not design, trial and error(s).

Good luck.

700 hour TBO ... SWEET! :rolleyes:

I would love to have a radial. It just wouldn't get any better. :)

Better yet--2 of em.......
 

Buy my Beech 18 and you are set......